Schedule files from the IVSCC server

The IVS distributes the schedule (SKD) files via the CDDIS webserver, with the German BKG and French OPAR sites acting as mirrors. By default, we use the BKG site for our scripts as this still permits anonymous FTP while CDDIS requires a login and a few extra steps. If slogit fails to download the SKD file for whatever reason, you can download the SKD file either through the web interface (e.g https://ivscc.gsfc.nasa.gov/sessions/2021/r11010/) or from the command line on ops8:

cd /vlbobs/ivs/sched/
curl -c /tmp/cookie -n -L -O "https://cddis.nasa.gov/archive/vlbi/ivsdata/aux/2021/r11010/r11010.skd"

NB - an appropriate .netrc file needs to be in place for this to work.